sview: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/sview - from package: sview

You may install the required package with command apt-get install {package}

Error in other languages:
sview: bevel nie gevind nie
sview: comandă negăsită
sview: comando não encontrado
sview: commande introuvable
sview: command not found
sview: käsku ei ole
sview: không tìm thấy lệnh
sview: komanda nerasta
sview: Kommando nicht gefunden.
sview: kommandot finns inte
sview: komut yok
sview: nie znaleziono polecenia
sview: níor aimsíodh an t-ordú
sview: no se encontró la orden
sview: no s'ha trobat l'ordre
sview: opdracht niet gevonden
sview: parancs nem található
sview: perintah tidak ditemukan
sview: príkaz nenájdený
sview: příkaz nenalezen
sview: команда не найдена
sview: командата не е открита
sview: 命令找不到
sview: コマンドが見つかりません